Math Olympiad for Elementary | 2019 | Division E | Contest 3 | MOEMS | 3B

Problem: In the list of numbers 3, 8, 13, 18, ...., 98, there are 20 numbers, and each number after the first is five more than the previous number. All of the numbers are added together to give a sum. What is the units digit of the sum?

Key: Finding a pattern, Abstract thinking

Please consider subscribing, liking, commenting, or sharing this video! We appreciate your support! Visit us at https://inquisitivekids.github.io